Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Employee Benefit Plans [Abstract]

Components Of Net Periodic Benefit Expense

	Three months ended
		March 31,
	2013				2012
Service cost	$	516		$	509
Interest cost on projected benefit obligation		505			505
Expected return on plan assets	(921		)		(803	)
Amortization of prior service benefit		(12	)		(12	)
Amortization of actuarial losses		341			347
Net periodic benefit expense	$	429		$	546